Malicious PDF — malware analysis report

Static analysis result for SHA-256 7224e75f880bed5a…

MALICIOUS

PDF

93.3 KB Created: 2021-06-01 22:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 75dd065cdc34f4d5fc7ee692de7591c9 SHA-1: 190eb31d110c5914f57f4fbdcf5a61233b834f91 SHA-256: 7224e75f880bed5a4ee2da90a2a0706681a6199556ecfefa70951223dc8690be
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/123?utm_term=pokemon+fireburn+gba+rom PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469641/normal_6026a6251f795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ffbf0e990b55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475562/normal_5fe0c4a5962e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_606c40a98aa01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474992/normal_603995c4cef2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_604066b0c7e04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_606b70947ffc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_601a86e24a50e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_6048fa4c3f41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_60548a76d0a34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451365/normal_606569b133b19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d876b5-b92a-4f07-a8fe-fdb60582ddad/safety_1st_onboard_35_air_360_infant_car_seat_base.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/gawileridipuneva.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/athulitha_baladama_hanuman_chalisa_lyrics_telugu.pdfIn PDF document text
    • http://didaneguk.pbworks.com/f/fovosikubeguwewaduvag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02c39b3-baa0-4382-ada1-979aa5cf2906/digital_design_audio_speakers.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144416895/52478691349.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/what_does_1231_mean_in_time.pdfIn PDF document text
    • http://pukagij.pbworks.com/f/27845013056.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10225 4308 bytes
SHA-256: 4ea73436d169f35110c068e1e6c476a3a8d536ba7f77a27c84a8cdcaa6a5a0c3
font_01_sfnt_off0001114e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 5080 bytes
SHA-256: 120cdb5fd5c7e385f46e3bcef2a86e2911d8e94659b6ab099fcb8327806fc921
font_02_sfnt_off0001228f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228F 15700 bytes
SHA-256: e76b16052f33c40a86a8fcdff30f77e91bf0415a11b466b944da764cf894893f
font_03_sfnt_off0001520c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1520C 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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